51413690 has 8 divisors (see below), whose sum is σ = 92544660. Its totient is φ = 20565472.

The previous prime is 51413689. The next prime is 51413699. The reversal of 51413690 is 9631415.

It can be written as a sum of positive squares in 2 ways, for example, as 51251281 + 162409 = 7159^2 + 403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51413690² = 5286735038832200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51413699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2570675 + ... + 2570694.

Almost surely, 2^51413690 is an apocalyptic number.

51413690 is a deficient number, since it is larger than the sum of its proper divisors (41130970).

51413690 is a wasteful number, since it uses less digits than its factorization.

51413690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141376.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 51413690 is about 7170.3340229030. The cubic root of 51413690 is about 371.8429839914.

The spelling of 51413690 in words is "fifty-one million, four hundred thirteen thousand, six hundred ninety".